diff --git a/src/evalfunc.c b/src/evalfunc.c
index 9e384da..b4e4220 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -7982,7 +7982,7 @@
 	return;
 
     if (argvars[1].v_type != VAR_UNKNOWN)
-	utf8 = (int)tv_get_number_chk(&argvars[1], NULL);
+	utf8 = (int)tv_get_bool_chk(&argvars[1], NULL);
 
     p = tv_get_string(&argvars[0]);
 
diff --git a/src/list.c b/src/list.c
index e0c8c2e..fa9843a 100644
--- a/src/list.c
+++ b/src/list.c
@@ -1397,7 +1397,7 @@
 	return;  // empty list results in empty string
 
     if (argvars[1].v_type != VAR_UNKNOWN)
-	utf8 = (int)tv_get_number_chk(&argvars[1], NULL);
+	utf8 = (int)tv_get_bool_chk(&argvars[1], NULL);
 
     CHECK_LIST_MATERIALIZE(l);
     ga_init2(&ga, 1, 80);
diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index a80767a..84fc7c9 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -1522,6 +1522,13 @@
   assert_equal(1, has('eval', true))
 enddef
 
+def Test_list2str_str2list_utf8()
+  let s = "\u3042\u3044"
+  let l = [0x3042, 0x3044]
+  assert_equal(l, str2list(s, true))
+  assert_equal(s, list2str(l, true))
+enddef
+
 def Fibonacci(n: number): number
   if n < 2
     return n
diff --git a/src/version.c b/src/version.c
index 9216408..a8cf168 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1610,
+/**/
     1609,
 /**/
     1608,